Unlock Mitsubishi GX Works3 FB / POU Password
Recover or remove a block password on a Function Block or POU in a Mitsubishi GX Works3 project — the same block-password mechanism as GX Works2, carried forward into GX Works3 for the newer iQ-R / iQ-F / FX5 controller families. This is a different, lower-level protection than the GX Works3 "security key," which locks the whole project file rather than an individual block. If you'd rather have it handled, I provide manual Mitsubishi recovery support — done personally, with nothing sold or downloaded from this site.
What this walkthrough covers
- GX Works3 block password / POU protection
- Recovering edit access to a locked FB or POU
Supported software & hardware
- GX Works3 projects (block password / POU protection)
- iQ-R / iQ-F / FX5U / FX5 controllers
Who this is for
- You forgot or lost the block password on your own FB or POU
- A previous engineer left and no password record was kept
- You've inherited a locked project you legally own and need to maintain it
Locked out of a Mitsubishi project you own?
Send the software and version, and a short description of what you're locked out of. The work is manual and done personally — no tools sold, no downloads.
Email for recovery support More on YouTubeQuestions
Which products and versions does this cover?
It applies to GX Works3 projects (block password / POU protection), iQ-R / iQ-F / FX5U / FX5 controllers.
Who does the recovery?
I do, personally. Every job is manual — it isn't automated with a tool and it isn't resold to anyone else.
Do I have to own the equipment?
Yes. I only help owners and authorized maintainers regain access to their own projects — in line with the authorized-use-only policy on the channel.
Do you sell a tool or a download for this?
No. There are no tools for sale and no downloads on this site. Recovery is a manual service I perform or guide you through.